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mathstoopidz
 4 years ago
5x+6y=7
2x+y=21
substitution method
mathstoopidz
 4 years ago
5x+6y=7 2x+y=21 substitution method

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jimmyrep
 4 years ago
Best ResponseYou've already chosen the best response.1y = 2x + 21 plug this into 5x + 6y = 7 to give an equation in x solve and sub this value in one of the original equatiuos to get y

Alexis1994_13
 4 years ago
Best ResponseYou've already chosen the best response.0The same method again. take the 2nd one and give a result for y. It will go like this: y=2x+21. Now go at the 1st one and when you see y put 2x+21. It will go like this: 5x+6(2x+21)=7...... you will found x and then go at 2nd again and put the number that you found. Use the same method for all.

Alexis1994_13
 4 years ago
Best ResponseYou've already chosen the best response.0x=7,right. So,now you will go at y=2x+21 and whenever you see x you will put 7. So we have : y= 2(7)+21=14+21=7 A(7,7).

mathstoopidz
 4 years ago
Best ResponseYou've already chosen the best response.1I think I get it... I just do not know why I am having a hard time with this..

mathstoopidz
 4 years ago
Best ResponseYou've already chosen the best response.1I have another, I am going to try this one and let me know if I am correct.. if you do not care please

Alexis1994_13
 4 years ago
Best ResponseYou've already chosen the best response.0It's pretty easy. That's one of the 3 types that you can solution this type of exercices. The 2nd type it's to multiply the hole equation with a number that you can add from the other equation for have 0 on x or y. Then you can easy find the other. When I say it it's harder to understand it. Focus more at school :)

mathstoopidz
 4 years ago
Best ResponseYou've already chosen the best response.18x+5y=4 2x+y=10 8x+5(2x+10)=4 x=3 2(3)+10=4+10=14 (4,4)?

Alexis1994_13
 4 years ago
Best ResponseYou've already chosen the best response.0x=3,that's right. Now you are going at 2x+y=10 and whenever you see x you will put 3. so we have : (2)(3)+y=10 => y=106 => y=4. A(3,4). Good job,you are going better. :)

Alexis1994_13
 4 years ago
Best ResponseYou've already chosen the best response.0No problem my friend.

mathstoopidz
 4 years ago
Best ResponseYou've already chosen the best response.1This one is a little different, can you help with this one please? 7x6y=35 5x+48=y

mathstoopidz
 4 years ago
Best ResponseYou've already chosen the best response.17x6(5x+48)=35 x=11 5(11)+48=7 y=7

mathstoopidz
 4 years ago
Best ResponseYou've already chosen the best response.1Omg... Thank you!!
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